App::Grok::Resource::u4x - u4x resource for grok


 use strict;
 use warnings;
 use App::Grok::Resource::u4x qw<:ALL>;

 # a list of all terms
 my @index = u4x_index();

 # documentation for a single term 
 my $pod = u4x_fetch('infix:<+>');


This resource looks maintains an index of syntax items that can be looked up. See



Takes no arguments. Lists all syntax items.


Takes an syntax item as an argument. Returns the documentation for it.


Takes a syntax item as an argument. Returns the file where it was found.


Adds two numbers together. If either of the things being added is not a Num, it will be converted to one before the addition. The result will be of the narrowest type possible.


Converts an object into a Num. In the case of List and Map, the numeric value is the number of elements and Pairs, respectively. Note that it's commas and not parentheses alone do not create a List, otherwise the following might be a surprise:

 say +(4,5,6);  # 3
 say +(4);      # 4

The same surprise does not happen for arrays, though, since they convey list context:

 my @a = 4;
 say +@a;       # 1


This twigil is deprecated. Use the * twigil instead.


Means 'one or more of the previous atom'. In other words, it means the same as <{1..*}>.


Used before and between character classes inside <> assertions to indicate the characters included in the match. Thus


will match all odd digits and the digit 4.

The plus at the start of an assertion is a no-op and can be left out.


The string form of a version recognizes the * wildcard in place of any position. It also recognizes a trailing +, so


is short for

    :ver(v6.2.3 .. v6.2.*)

And saying


specifically rules out any prereleases.